Options & Mechanicals

Two optional plug-in setpoint controller boards are available to add control and alarm capability to Laureate DPMs, counters and remote displays: A board with two Form C, 10 amp, 250 Vac contact relays. A board with two Form A AC/DC solid state relays rated 120 mA at 125 Vac or 250 mA at 150 Vdc. The solid state version is recommended for high duty cycles and low-level loads. Setpoint values and deviation bands are easily entered via front panel pushbuttons or by computer via the serial interface. Security lockout of the front panel pushbuttons may be set to allow operators to view but not change setpoint values. Front panel push-button operation can also be completely disabled

The Laureate analog output option board provides an isolated 0-10 Vdc voltage signal to drive a chart recorder, plus an isolated 0-20 mA or 4-20 mA current signal for transmission to a computer or central control room. This option is compatible with all Laureate meters and counters, and turns these into highly accurate, sourcing, 4-wire transmitters. The output for thermocouples, RTDs and custom curves is linearized to the displayed reading.Isolation is provided by a separate on-board power supply, which is powered by the meter. This supply can drive 20 mA current into loads up to 600 ohms, for 12 V compliance. Isolation to signal ground and power ground eliminates problems caused by ground loops.

Laureate™ DPMs and counters offer RS-232 or RS-485 communication boards to interface with computers, PLCs or other digital devices, including the Laureate 6-digit remote display. Both boards are connected via phone jacks using standard 4- or 6-conductor phone cables. With either board, Laurel Electronics provides Windows-compatible software which allows device setup via a computer monitor.With DPMs and counters, the information transmitted via RS-232 or RS-485 includes the latest signal value (filtered or unfiltered), peak signal value, alarm values and status. By using a serial interface board, a Laureate counter can be used as a remote display to an external device or to another Laureate.

The Laureate™ BCD option provides an isolated, three-state, parallel, stored BCD output to external devices such as PLCs, panel-mount printers, and dataloggers. The BCD outputs of multiple meters can be multiplexed by addressing each meter with its own Enable line. Only the addressed meter will provide data output, while the other non-addressed meters are held in a non-transmitting high impedance output state. BCD Hold and Data Ready outputs further simplify the interface.The parallel BCD output from a Laureate DPM or counter is often used to drive a panel-mount printer for a hard copy record. Some printer models will print at programmed time intervals

Laureate™ digital panel meters, digital counters and 6-digit remote display offer a choice of two high-frequency switching power supplies. These provide stable, isolated power for instrument operation plus excitation outputs at a substantially reduced weight and over a broader range of input voltages and power frequencies than conventional linear supplies. High voltage AC or DC power. The standard Laureate supply accepts power from 85 to 264 Vac, 47 to 440 Hz. This allows the same meter to operate worldwide without modification. The supply also accepts 90 to 370 Vdc.Low voltage AC or DC power. An optional low voltage supply operates from 9 to 37 Vdc or 8 to 28 Vac, 47 to 440 Hz. This supply allows the Laureate to be powered from batteries or from 28 Vac, 400 Hz aircraft power